Gas vs Coal (2 of 2) (IMAGE) Carnegie Institution for Science Caption This is a second comparison of the typical natural gas plant with the typical coal plant, courtesy of Ken Caldeira. Credit Carnegie's Ken Caldeira Usage Restrictions With credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.